CN105137760A - Denitration spraying ammonia automation control method and system - Google Patents
Denitration spraying ammonia automation control method and system Download PDFInfo
- Publication number
- CN105137760A CN105137760A CN201510622480.XA CN201510622480A CN105137760A CN 105137760 A CN105137760 A CN 105137760A CN 201510622480 A CN201510622480 A CN 201510622480A CN 105137760 A CN105137760 A CN 105137760A
- Authority
- CN
- China
- Prior art keywords
- ammonia spraying
- spraying amount
- amount
- ammonia
- nitrogen oxides
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Abstract
The invention discloses a denitration spraying ammonia automation control method which is applied to a coal-fired boiler SCR system. The method comprises the following steps of acquiring a total air volume of a boiler and an entrance nitric oxide content of the system, and multiplying the total air volume of the boiler by the entrance nitric oxide content of the system so as to obtain a total nitric oxide content in a flue gas; according to the nitric oxide content, using a predetermined basic spraying ammonia amount feedforward function to obtain a basic spraying ammonia amount; according to an entrance nitric oxide content set value of the system, acquiring a correction coefficient of the predetermined basic spraying ammonia amount, multiplying the correction coefficient by the basic spraying ammonia amount so as to obtain a target spraying ammonia amount, and taking the target spraying ammonia amount as a denitration spraying ammonia amount. By using the method, a theoretical spraying ammonia amount can match an actual-needed spraying ammonia amount; a probability of excess emission of nitric oxide and an environmental protection risk brought by the excess emission can be reduced; and negative effects and economic losses brought by excessive spraying ammonia are decreased.
Description
Technical field
The present invention relates to automatic control technology field, particularly a kind of denitration spray ammonia autocontrol method and system.
Background technology
The logic of the denitration spray ammonia autocontrol method adopted in prior art is the flow adopting the product of flue gas flow and SCR inlet nitrogen oxides content to obtain nitrogen oxides in effluent, obtain the theoretical ammonia spraying amount corresponding to oxides of nitrogen flow by theoretical calculation formula again, control spray ammonia variable valve using this theoretical ammonia spraying amount as feedforward and carry out ammonia spraying amount control.In order to accurately control SCR exports amount of nitrogen oxides near desired value, increase PID Closed-loop Control Strategy again, revised theory ammonia spraying amount, make SCR export oxides of nitrogen and be controlled near desired value.
But above-mentioned control strategy carries out ammonia spraying amount controls to there is following shortcoming and defect:
First, because often there is comparatively big error in the measurement of flue gas flow, relatively large deviation is there is in this with regard to causing the ammonia spraying amount of theoretical ammonia spraying amount result of calculation and actual needs, and the measurement of ammonia flow sometimes neither be very accurate, therefore by the ammonia spraying amount of theory calculate, effect is unsatisfactory in actual applications;
Secondly, under boiler different load, carry out that coal pulverizer opens, the stopping time, nitrogen oxides in effluent content can fluctuation, and analysis meter is measured the process that SCR exports amount of nitrogen oxides and be there is larger delay.When measurement instrument display amount of nitrogen oxides value is normal, amount of nitrogen oxides actual in flue gas has started significantly to change, when measurement instrument detects that this change goes to control ammonia spraying amount again, late, or cause amount of nitrogen oxides in fume emission process to exceed environmental administration's examination value, cause environmental fines, or spray into ammonia because of excessive, cause waste, and because a large amount of generations of NH4HSO4, cause air preheater to block, reduce air preheater heat exchange efficiency.Therefore, how to realize efficiently, the spray of denitration accurately ammonia controls automatically, is those skilled in the art's technical issues that need to address.
Summary of the invention
The object of this invention is to provide a kind of denitration spray ammonia autocontrol method, the method can make theoretical ammonia spraying amount match with the ammonia spraying amount realizing needing, reach the probability reducing oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and the negative effect reducing excessive spray ammonia and bring and economic loss.
For solving the problems of the technologies described above, the invention provides a kind of denitration spray ammonia autocontrol method, being applied to the system of coal-burning boiler SCR, comprising:
Obtain the inlet nitrogen oxides content of boiler total blast volume and described system, and described boiler total blast volume is multiplied with described inlet nitrogen oxides content, obtain amount of nitrogen oxides total in flue gas;
According to described amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount;
According to the outlet amount of nitrogen oxides setting value of described system, obtain the correction factor of predetermined basic ammonia spraying amount, and described correction factor is multiplied with described basic ammonia spraying amount, obtain target ammonia spraying amount as denitration ammonia spraying amount.
Wherein, also comprise:
Obtain the total coal amount of boiler, and described boiler total blast volume and the total coal amount of described boiler are divided by, obtain the coal-air ratio of boiler combustion;
According to described coal-air ratio, utilize predetermined coal-air ratio to predict ammonia spraying amount function, obtain predicted value;
According to described total blast volume, utilize predetermined wind amount correction factor, obtain the first ammonia spraying amount modified value;
Described predicted value is multiplied with described first ammonia spraying amount modified value, obtains revising feedforward ammonia spraying amount;
Obtain denitration ammonia spraying amount to comprise:
Utilize described target ammonia spraying amount and described correction feedforward ammonia spraying amount, obtain denitration ammonia spraying amount.
Wherein, also comprise:
Obtain the outlet amount of nitrogen oxides of described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value;
Obtain denitration ammonia spraying amount to comprise:
Utilize described target ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount; Or
Utilize described target ammonia spraying amount, described correction feedforward ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount.
Wherein, also comprise:
By pre-defined algorithm, auto modification is carried out to described predetermined basic ammonia spraying amount feedforward function.
Wherein, also comprise:
By pre-defined algorithm, auto modification is carried out to described predetermined coal-air ratio prediction ammonia spraying amount function.
Wherein, described pre-defined algorithm comprises: neural network algorithm and self-learning algorithm.
The invention provides a kind of denitration spray ammonia automatic control system, be applied to the system of coal-burning boiler SCR, comprise:
Acquisition module, for obtaining the inlet nitrogen oxides content of boiler total blast volume and described system, and being multiplied described boiler total blast volume with described inlet nitrogen oxides content, obtaining amount of nitrogen oxides total in flue gas;
First computing module, for according to described amount of nitrogen oxides, utilizes predetermined basic ammonia spraying amount feedforward function, obtains basic ammonia spraying amount;
Second computing module, for the outlet amount of nitrogen oxides setting value according to described system, obtains the correction factor of predetermined basic ammonia spraying amount, and is multiplied with described basic ammonia spraying amount by described correction factor, obtain target ammonia spraying amount as denitration ammonia spraying amount.
Wherein, also comprise:
Coal-air ratio module, for obtaining the total coal amount of boiler, and being divided by described boiler total blast volume and the total coal amount of described boiler, obtaining the coal-air ratio of boiler combustion;
Prediction module, for according to described coal-air ratio, utilizes predetermined coal-air ratio to predict ammonia spraying amount function, obtains predicted value;
First correcting module, for according to described total blast volume, utilizes predetermined wind amount correction factor, obtains the first ammonia spraying amount modified value;
3rd computing module, for described predicted value being multiplied with described first ammonia spraying amount modified value, obtains revising feedforward ammonia spraying amount;
Second computing module also for utilizing described target ammonia spraying amount and described correction feedforward ammonia spraying amount, obtains denitration ammonia spraying amount.
Wherein, also comprise:
Second correcting module, for obtaining the outlet amount of nitrogen oxides of described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value;
Second computing module also for utilizing described target ammonia spraying amount and described second ammonia spraying amount modified value, obtains denitration ammonia spraying amount; Or utilizing described target ammonia spraying amount, described correction feedforward ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount.
Wherein, also comprise:
First correcting module, for by pre-defined algorithm, carries out auto modification to described predetermined basic ammonia spraying amount feedforward function;
Second correcting module, for by pre-defined algorithm, carries out auto modification to described predetermined coal-air ratio prediction ammonia spraying amount function.
First the method is multiplied with inlet nitrogen oxides content by boiler total blast volume, obtaining amount of nitrogen oxides total in flue gas replaces the product by flue gas flow and SCR inlet nitrogen oxides content of the prior art to obtain the flow of nitrogen oxides in effluent, can be more accurate; Because the measurement of boiler total blast volume is more accurate compared with the measurement of the flow of exhaust gas volumn, and the change of boiler total blast volume can the change of antedating response flue gas flow, can reach the object changing ammonia spraying amount in advance.Secondly, according to amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount, basic ammonia spraying amount owing to being calculated by predetermined basic ammonia spraying amount feedforward function in this step, is tallied with the actual situation more than the value utilizing theory function to calculate in prior art.Finally, by correction factor, ammonia spraying amount is revised, therefore can obtain ammonia spraying amount more accurately.The method can make theoretical ammonia spraying amount match with the ammonia spraying amount realizing needing, and reaches the probability reducing oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and the negative effect reducing excessive spray ammonia and bring and economic loss.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to the accompanying drawing provided.
The process flow diagram of the denitration spray ammonia autocontrol method that Fig. 1 provides for the embodiment of the present invention;
The process flow diagram of another denitration spray ammonia autocontrol method that Fig. 2 provides for the embodiment of the present invention;
The process flow diagram of the another denitration spray ammonia autocontrol method that Fig. 3 provides for the embodiment of the present invention;
The structured flowchart of the denitration spray ammonia automatic control system that Fig. 4 provides for the embodiment of the present invention.
Embodiment
Core of the present invention is to provide a kind of denitration spray ammonia autocontrol method, the method can make theoretical ammonia spraying amount match with the ammonia spraying amount realizing needing, reach the probability reducing oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and the negative effect reducing excessive spray ammonia and bring and economic loss.
For making the object of the embodiment of the present invention, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the embodiment of the present invention, technical scheme in the embodiment of the present invention is clearly and completely described, obviously, described embodiment is the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Please refer to Fig. 1, the process flow diagram of the denitration spray ammonia autocontrol method that Fig. 1 provides for the embodiment of the present invention; Be applied to the system of coal-burning boiler SCR, the method can comprise:
The inlet nitrogen oxides content of step s100, acquisition boiler total blast volume and described system, and described boiler total blast volume is multiplied with described inlet nitrogen oxides content, obtain amount of nitrogen oxides total in flue gas;
Wherein, be first multiplied by inlet nitrogen oxides content by boiler total blast volume and calculate amount of nitrogen oxides total in flue gas.The measurement according to the relative exhaust gas volumn flow of measurement being boiler total blast volume of this step is more accurate, and the change of the energy of air quantity change simultaneously antedating response flue gas flow, therefore, it is possible to reach the object changing ammonia spraying amount in advance.Therefore, in order to ensure the accurate Calculation of ammonia spraying amount, the present invention adopts the inlet nitrogen oxides content by obtaining boiler total blast volume and described system, and is multiplied with described inlet nitrogen oxides content by described boiler total blast volume, obtains amount of nitrogen oxides total in flue gas.
Step s110, according to described amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount;
Wherein, due in prior art, the product being employing flue gas flow and system entry amount of nitrogen oxides by the automatic steering logic of denitration spray ammonia adopted obtains the flow of nitrogen oxides in effluent, obtain the theoretical ammonia spraying amount corresponding to oxides of nitrogen flow by theoretical calculation formula again, and control spray ammonia variable valve using this theoretical ammonia spraying amount as feedforward and carry out ammonia spraying amount control.
First, measuring exhaust gas volumn flow and do not measure boiler total blast volume accurately, often there is larger deviation in flue gas flow; Under this deviation, the amount of nitrogen oxides using theoretical formula method to obtain is necessarily inaccurate; Secondly, the theoretical formula of use calculates ammonia spraying amount, because theoretical formula is all generally obtain under the precise conditions in laboratory, therefore, when reality uses, because changing a little of condition all can make theoretical formula have certain deviation; Therefore, the ammonia spraying amount content using theoretical formula to obtain also has certain error; Finally, the measurement of ammonia flow sometimes neither be very accurate, and therefore by the ammonia spraying amount of theory calculate, effect is unsatisfactory in actual applications.
Therefore, the present invention uses predetermined basic ammonia spraying amount feedforward function to calculate basic ammonia spraying amount.This predetermined basic ammonia spraying amount feedforward function can be that during Boiler Stable Combustion, total amount of nitrogen oxides and the corresponding relation of ammonia spraying amount obtain by under consulting different load section.Again to its debugging by a period of time, this function can also be continued to optimize, finally obtains predetermined basic ammonia spraying amount feedforward function.Then this predetermined basic ammonia spraying amount feedforward function is according under practical condition, total amount of nitrogen oxides and the corresponding relation of ammonia spraying amount obtain, therefore, and its corresponding theoretical formula, this predetermined basic ammonia spraying amount feedforward function is more accurate, more can embody production actual conditions.What also balanced in all measurements is inaccurate.
Step s120, outlet amount of nitrogen oxides setting value according to described system, obtain the correction factor of predetermined basic ammonia spraying amount, and be multiplied with described basic ammonia spraying amount by described correction factor, obtain target ammonia spraying amount as denitration ammonia spraying amount.
Wherein, in order to accurately control SCR exports amount of nitrogen oxides near desired value, increase PID Closed-loop Control Strategy again, revised theory ammonia spraying amount, make SCR export oxides of nitrogen and be controlled near desired value.
Wherein, obtain the correction factor of predetermined basic ammonia spraying amount, utilize the output basic ammonia spraying amount of this correction factor to predetermined basic ammonia spraying amount feedforward function to revise; The result be multiplied with basic ammonia spraying amount by correction factor is as denitration ammonia spraying amount, and the basic ammonia spraying amount that namely can be understood as upper step obtains is revised, and using correction result as revised, denitration ammonia spraying amount accurately.The object of this correction factor is the accuracy in order to make a reservation for basic ammonia spraying amount feedforward function when adapting to different control objectives.More adequately with under ature of coal condition, the amount of ammonia needed for different oxides of nitrogen total amount, can be sprayed into by reacting phase by above-mentioned funtcional relationship.From and further improve accuracy and the reliability of the ammonia spraying amount finally obtained.
Based on technique scheme, denitration spray ammonia autocontrol method provided by the present invention, be applied to the system of coal-burning boiler SCR, first the method is multiplied with inlet nitrogen oxides content by boiler total blast volume, obtaining amount of nitrogen oxides total in flue gas replaces the product by flue gas flow and SCR inlet nitrogen oxides content of the prior art to obtain the flow of nitrogen oxides in effluent, can be more accurate; Because the measurement of boiler total blast volume is more accurate compared with the measurement of the flow of exhaust gas volumn, and the change of boiler total blast volume can the change of antedating response flue gas flow, can reach the object changing ammonia spraying amount in advance.Secondly, according to amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount, basic ammonia spraying amount owing to being calculated by predetermined basic ammonia spraying amount feedforward function in this step, is tallied with the actual situation more than the value utilizing theory function to calculate in prior art.Finally, by correction factor, ammonia spraying amount is revised, therefore can obtain ammonia spraying amount more accurately.The method can make theoretical ammonia spraying amount match with the ammonia spraying amount realizing needing, and reaches the probability reducing oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and the negative effect reducing excessive spray ammonia and bring and economic loss.
Preferably, please refer to Fig. 2, the process flow diagram of another denitration spray ammonia autocontrol method that Fig. 2 provides for the embodiment of the present invention; The method can comprise:
The inlet nitrogen oxides content of step s200, acquisition boiler total blast volume and described system, and described boiler total blast volume is multiplied with described inlet nitrogen oxides content, obtain amount of nitrogen oxides total in flue gas;
Step s210, according to described amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount;
Step s220, outlet amount of nitrogen oxides setting value according to described system, obtain the correction factor of predetermined basic ammonia spraying amount, and be multiplied with described basic ammonia spraying amount by described correction factor, obtain target ammonia spraying amount;
Step s230, the total coal amount of acquisition boiler, and described boiler total blast volume and the total coal amount of described boiler are divided by, obtain the coal-air ratio of boiler combustion;
Step s240, according to described coal-air ratio, utilize predetermined coal-air ratio to predict ammonia spraying amount function, obtain predicted value;
Step s250, according to described total blast volume, utilize predetermined wind amount correction factor, obtain the first ammonia spraying amount modified value;
Step s260, described predicted value to be multiplied with described first ammonia spraying amount modified value, to obtain revising feedforward ammonia spraying amount;
Wherein, step s230 to step s260 can after step s210 and step s220, also can before step s210 and step s220;
Wherein, the object of step s230 to step s260 under different load, carries out that coal pulverizer opens, the stopping time due to boiler, and nitrogen oxides in effluent content can fluctuation, and existing analysis meter is measured the process that SCR exports amount of nitrogen oxides and be there is larger delay.When measurement instrument display amount of nitrogen oxides value is normal, amount of nitrogen oxides actual in flue gas has started significantly to change, when measurement instrument detects that this change goes to control ammonia spraying amount again, late, or cause amount of nitrogen oxides in fume emission process to exceed environmental administration's examination value, cause environmental fines, or spray into ammonia because of excessive, cause waste, and because NH
4hSO
4a large amount of generations, cause air preheater to block, reduce air preheater heat exchange efficiency.
Therefore, under the ature of coal of boiler combustion does not have vicissitudinous condition, when identical total blast volume, total coal amount, the amount of the oxides of nitrogen of generation is relatively stable.But when coal amount does not change, and when coal-air ratio changes, the principle produced according to boiler oxides of nitrogen, the amount of the oxides of nitrogen of generation also can change.Just based on this principle, prediction algorithm adopts the change of coal-air ratio in boiler combustion process to predict the variable quantity of nitrogen oxides in effluent, thus revises ammonia spraying amount feedforward amount in advance, reaches control SCR in advance and exports the object of amount of nitrogen oxides.This algorithm also effectively can judge that coal pulverizer opens under different load condition, stop the trend that causes oxides of nitrogen to change.
Concrete grammar in this embodiment can be the coal-air ratio first measured divided by total coal with total blast volume in boiler combustion process, then is variable with coal-air ratio, determines the output quantity of predetermined coal-air ratio prediction ammonia spraying amount function.This output quantity is multiplied by according to described total blast volume again, utilizes predetermined wind amount correction factor, obtain the first ammonia spraying amount modified value, finally obtain revising feedforward ammonia spraying amount; The amount of the ammonia sprayed under being used for revising different total blast volume condition.In the method, modified value and the air quantity of the corresponding ammonia spraying amount of coal-air ratio can be first by consulting historical trend to determine to the correction of ammonia spraying amount; Also optimum each function above-mentioned and coefficient can be determined by constantly debugging again on this basis.The more accurate of ammonia spraying amount can be made by the prediction algorithm of above-mentioned steps s230 to step s260.
Step s270, utilize described target ammonia spraying amount and described correction feedforward ammonia spraying amount, obtain denitration ammonia spraying amount.
Based on above-mentioned two kinds of technical schemes, the denitration spray ammonia autocontrol method that the embodiment of the present invention provides, be applied to the system of coal-burning boiler SCR, the method can solve in prior art feedover theoretical ammonia spraying amount ammonia spraying amount and the unmatched problem of actual needs ammonia spraying amount, also by prediction algorithm correction feedforward ammonia spraying amount, make up the problem that measurement instrument measurement result exists large delay.Finally, by the solution of two problems, reach the object steadily controlling nitrogen oxides in effluent content, the probability reducing enterprise's oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and reduce negative effect and economic loss that excessively spray ammonia brings.
Preferably, please refer to Fig. 3, the process flow diagram of the another denitration spray ammonia autocontrol method that Fig. 3 provides for the embodiment of the present invention; The method can comprise:
The inlet nitrogen oxides content of step s300, acquisition boiler total blast volume and described system, and described boiler total blast volume is multiplied with described inlet nitrogen oxides content, obtain amount of nitrogen oxides total in flue gas;
Step s310, according to described amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount;
Step s320, outlet amount of nitrogen oxides setting value according to described system, obtain the correction factor of predetermined basic ammonia spraying amount, and be multiplied with described basic ammonia spraying amount by described correction factor, obtain target ammonia spraying amount;
Step s330, the outlet amount of nitrogen oxides obtaining described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value;
Wherein, the order of described step s320 and described step s330 does not limit, and it met before step s340.
Step s340, utilize described target ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount.
Wherein, can also increase step s230 in another embodiment in the scheme in the present embodiment to step s260, wherein, the position of step s230 to step s260 can be placed on after step s310, also can after step s330; Also can after step s320.
Based on technique scheme, denitration spray ammonia autocontrol method provided by the present invention, be applied to the system of coal-burning boiler SCR, the method is on the basis of Fig. 1 embodiment, again by obtaining the outlet amount of nitrogen oxides of described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value.Calculate more adequately with under ature of coal condition, the amount of ammonia needed for different oxides of nitrogen total amount, can be sprayed into by reacting phase by above-mentioned PID.From and further improve accuracy and the reliability of the ammonia spraying amount finally obtained.The method can make theoretical ammonia spraying amount match with the ammonia spraying amount realizing needing, and reaches the probability reducing oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and the negative effect reducing excessive spray ammonia and bring and economic loss.
Wherein, preferably, can also comprise in each embodiment above-mentioned:
By pre-defined algorithm, auto modification is carried out to described predetermined basic ammonia spraying amount feedforward function.
Wherein, current predetermined basic ammonia spraying amount feedforward function be by consult history add the later stage debugging obtain.This is a kind of basic skills, and the later stage, by introducing pre-defined algorithm, realizes the auto modification to predetermined basic ammonia spraying amount feedforward function, thus adapts to the function that coal varitation brings better, and obtains more accurate control effects.Wherein, preferably, described pre-defined algorithm comprises: neural network algorithm and self-learning algorithm.
Wherein, preferably, can also comprise in each embodiment above-mentioned:
By pre-defined algorithm, auto modification is carried out to described predetermined coal-air ratio prediction ammonia spraying amount function.
Wherein, current predetermined coal-air ratio prediction ammonia spraying amount function is also add later stage debugging obtain by consulting history.If the drawback that this predetermined coal-air ratio prediction ammonia spraying amount function exists to adapt to coal varitation.Can revise it according to pre-defined algorithm, wherein, preferably, described pre-defined algorithm comprises: neural network algorithm and self-learning algorithm.Namely can introduce neural network and self-learning algorithm, realize, to the auto modification of prediction spray ammonia, better adapting to coal varitation.
Based on technique scheme, the denitration spray ammonia autocontrol method that the embodiment of the present invention provides, be applied to the system of coal-burning boiler SCR, the method can solve in prior art feedover theoretical ammonia spraying amount ammonia spraying amount and the unmatched problem of actual needs ammonia spraying amount, also by prediction algorithm correction feedforward ammonia spraying amount, make up the problem that measurement instrument measurement result exists large delay.Finally, by the solution of two problems, reach the object steadily controlling nitrogen oxides in effluent content, the probability reducing enterprise's oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and reduce negative effect and economic loss that excessively spray ammonia brings.And the method can carry out auto modification to each function, improve accuracy and the adaptability of each function, finally reach control effects more accurately.
Based on above-mentioned various embodiment, the present invention also enumerates a specific embodiment to show method technique scheme:
In the present invention, about current SCR system, the ammonia spraying amount steering logic of two parts is separate, and method is identical, is independent of each other.Now control to be described for one-sided ammonia spraying amount, the calculating of one-sided total ammonia spraying amount be decomposed into three parts:
One is one-sided feedforward ammonia spraying amount part.The calculating of feedforward ammonia spraying amount is realized by following method:
First, be multiplied by one-sided SCR inlet nitrogen oxides content by boiler total blast volume and calculate amount of nitrogen oxides total in one-sided flue gas, be i.e. one-sided total amount of nitrogen oxides.This design according to the measurement being boiler total blast volume, comparatively exhaust gas volumn flow measurement is more accurate, air quantity change simultaneously can the change of antedating response flue gas flow, therefore, it is possible to reach the object changing ammonia spraying amount in advance.Although total blast volume does not represent one-sided SCR exhaust gas volumn, the variation tendency of one-sided flue gas flow can be reflected, and the variation tendency of the total amount of nitrogen oxides in this side calculated thus.
Secondly, set up the funtcional relationship of one-sided total amount of nitrogen oxides and one-sided basic ammonia spraying amount, i.e. one-sided predetermined basic ammonia spraying amount feedforward function.The piecewise linear function that this function can be is variable with one-sided total amount of nitrogen oxides, correlation parameter in funtcional relationship is not obtained by theory calculate, but by under consulting different load section, during Boiler Stable Combustion, the corresponding relation of one-sided total amount of nitrogen oxides and one-sided total ammonia spraying amount is concluded and is drawn.Again by the debugging of a period of time, continue to optimize this function, just can obtain optimal function relation.The optimization of this function also carries out Automatic Optimal by neural network algorithm and self-learning algorithm.Draw because one-sided predetermined basic ammonia spraying amount feedforward function is the variation relation by concluding function variable function value in boiler actual moving process, so function variable might not be the actual value of this side nitrogen oxides in effluent content, as long as truly can reflect that the variation tendency of this value just can meet the demands.
Wherein, when debugging one-sided predetermined basic ammonia spraying amount feedforward function, first to determine the one-sided basic ammonia spraying amount corresponding to amount of nitrogen oxides total in different one-sided flue gases according to history curve.The determination of this corresponding relation, basicly stable at load, when air quantity, coal amount change little, otherwise there is relatively large deviation in the funtcional relationship set up.After tentatively determining each parameter of predetermined basic ammonia spraying amount feedforward function, the correction factor of predetermined basic ammonia spraying amount is set as 1, outlet oxides of nitrogen setting value is set as a fixed value, starts the one-sided basic ammonia spraying amount function of dynamic debugging.According to automatic controlling curve, continue to optimize each parameter of different load situation minor function, obtain optimal function.
Finally, the output of one-sided predetermined basic ammonia spraying amount feedforward function is multiplied by the output of the correction factor of one-sided predetermined basic ammonia spraying amount, obtains one-sided basic ammonia spraying amount.The piecewise linear function that the correction factor of one-sided predetermined basic ammonia spraying amount is is variable with the setting value of single side outlet amount of nitrogen oxides control objectives value is drawn by later stage debugging conclusion.Its adjustment method is identical with the adjustment method of one-sided basic ammonia spraying amount function.Changes in demand to feedforward ammonia spraying amount when the object designing this coefficient function is to adapt to different control objectives.
Wherein, the correction factor debugging one-sided predetermined basic ammonia spraying amount is started.Adjustment method is under stable situation, change outlet oxides of nitrogen setting value, when the ratio calculating actual ammonia spraying amount and basic ammonia spraying amount function after system stability and export, by setting multiple value, obtain multiple ratio, thus obtain each parameter of the correction factor of one-sided predetermined basic ammonia spraying amount.
Two is one-sided predictive feed forward ammonia spraying amounts.
Under the ature of coal of boiler combustion does not have vicissitudinous condition, when total blast volume, total coal amount are constant, the amount of the oxides of nitrogen of generation is relatively stable.But when coal amount does not change, and when the ratio of total blast volume and total coal amount (abbreviation coal-air ratio) changes, the principle produced according to boiler oxides of nitrogen, the amount of the oxides of nitrogen of generation can change thereupon.Just based on this principle, prediction algorithm adopts the change of coal-air ratio in boiler combustion process to predict the variation tendency of nitrogen oxides in effluent content, revises ammonia spraying amount feedforward amount in advance, reaches control SCR in advance and exports the object of amount of nitrogen oxides.This algorithm also effectively can judge that coal pulverizer opens under different load condition, stop the trend that causes oxides of nitrogen to change.
First, set up boiler coal-air ratio and one-sided predetermined coal-air ratio predicts ammonia spraying amount funtcional relationship, i.e. one-sided fundamental forecasting feedforward ammonia spraying amount function.This function take coal-air ratio as the piecewise linear function of variable, and the correlation parameter in funtcional relationship is by analysis of history trend, and debugging conclusion draws through the later stage.These parameters, also carry out Automatic Optimal by neural network algorithm and self-learning algorithm.
Wherein, the debugging of one-sided predetermined coal-air ratio prediction ammonia spraying amount function is different from the debugging of one-sided predetermined basic ammonia spraying amount feedforward function, reason is the impact of coal-air ratio change on outlet oxides of nitrogen is not reflect in real time, just reflects after often needing fixing delay time.This just needs first to determine the delay time by analysis of history trend, the variable quantity of oxides of nitrogen is exported again by the SCR observed before and after coal-air ratio change, estimation feedforward ammonia spraying amount, thus obtain the relation of coal-air ratio and feedforward ammonia spraying amount, thus determine each parameter of one-sided predetermined coal-air ratio prediction ammonia spraying amount function.By debugging, obtain best feedforward ammonia spraying amount funtcional relationship.It should be noted that, when boiler normal combustion, coal-air ratio is often in a fixed range, and within the scope of this, the change that SCR exports oxides of nitrogen is also little, therefore within the scope of this coal-air ratio, the output of predetermined basic ammonia spraying amount feedforward function should not change, only when coal-air ratio exceeds this scope, just need to spray ammonia in advance, reduce the turnout that SCR exports oxides of nitrogen.
Next, one-sided total blast volume is multiplied by the output of one-sided predetermined coal-air ratio prediction ammonia spraying amount function, obtains one-sided first ammonia spraying amount modified value.This coefficient is with the output of the boiler total blast volume piecewise linear function that is variable.Similar with the feedover adjustment method of ammonia spraying amount function of one-sided fundamental forecasting, the correlation parameter of this function is drawn by later stage debugging conclusion, also carries out Automatic Optimal by neural network algorithm and self-learning algorithm.
Wherein, after one-sided predetermined coal-air ratio prediction ammonia spraying amount function has been debugged, tackled one-sided predetermined wind amount correction factor and debugged.The debugging of this correction factor function needs according under different total blast volume condition, and identical coal-air ratio change is determined the influence amount that SCR exports oxides of nitrogen, and the variable of this function is total blast volume.By one-sided predetermined wind amount correction factor, the demand under enabling the output of one-sided predetermined coal-air ratio prediction ammonia spraying amount function adapt to different load condition, reaches optimum efficiency.
Three is ammonia spraying amounts that PID revises.
This part can be identical with the current PID control strategy generally adopted, when one-sided SCR export amount of nitrogen oxides desired value and measured corresponding one-sided SCR export amount of nitrogen oxides there is deviation time, ammonia spraying amount modified value will be exported by PID controller.Consider that SCR exports the larger time delay of measurement existence of amount of nitrogen oxides, when system is in dynamic adjustment process, the condition resonated is there is in the output of pid algorithm with actual measurement oxides of nitrogen value, therefore must adjust PID controller parameter, make its time constant be greater than the twice of oxides of nitrogen transfer delay time.
One-sided total ammonia spraying amount calculates and is applied to one-sided spray ammonia as setting value and adjusts on valve Control PID algorithm afterwards, and value of feedback is the actual ammonia spraying amount recorded.Like this, the closed-loop control to ammonia spraying amount is just defined.
Embodiments provide denitration spray ammonia autocontrol method, theoretical ammonia spraying amount can be able to be made to match with the ammonia spraying amount realizing needing by said method.
Be introduced the denitration spray ammonia automatic control system that the embodiment of the present invention provides below, denitration spray ammonia automatic control system described below sprays ammonia autocontrol method with above-described denitration can mutual corresponding reference.
Please refer to Fig. 4, the structured flowchart of the denitration spray ammonia automatic control system that Fig. 4 provides for the embodiment of the present invention; Be applied to the system of coal-burning boiler SCR, this system can comprise:
Acquisition module 100, for obtaining the inlet nitrogen oxides content of boiler total blast volume and described system, and being multiplied described boiler total blast volume with described inlet nitrogen oxides content, obtaining amount of nitrogen oxides total in flue gas;
First computing module 200, for according to described amount of nitrogen oxides, utilizes predetermined basic ammonia spraying amount feedforward function, obtains basic ammonia spraying amount;
Second computing module 300, for the outlet amount of nitrogen oxides setting value according to described system, obtains the correction factor of predetermined basic ammonia spraying amount, and is multiplied with described basic ammonia spraying amount by described correction factor, obtain target ammonia spraying amount as denitration ammonia spraying amount.
Based on technique scheme, the embodiment of the present invention can also comprise:
Coal-air ratio module, for obtaining the total coal amount of boiler, and being divided by described boiler total blast volume and the total coal amount of described boiler, obtaining the coal-air ratio of boiler combustion;
Prediction module, for according to described coal-air ratio, utilizes predetermined coal-air ratio to predict ammonia spraying amount function, obtains predicted value;
First correcting module, for according to described total blast volume, utilizes predetermined wind amount correction factor, obtains the first ammonia spraying amount modified value;
3rd computing module, for described predicted value being multiplied with described first ammonia spraying amount modified value, obtains revising feedforward ammonia spraying amount;
Second computing module also for utilizing described target ammonia spraying amount and described correction feedforward ammonia spraying amount, obtains denitration ammonia spraying amount.
Based on above-mentioned any technical scheme, the embodiment of the present invention can also comprise:
Second correcting module, for obtaining the outlet amount of nitrogen oxides of described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value;
Second computing module also for utilizing described target ammonia spraying amount and described second ammonia spraying amount modified value, obtains denitration ammonia spraying amount; Or utilizing described target ammonia spraying amount, described correction feedforward ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount.
Based on above-mentioned any technical scheme, the embodiment of the present invention can also comprise:
First correcting module, for by pre-defined algorithm, carries out auto modification to described predetermined basic ammonia spraying amount feedforward function;
Second correcting module, for by pre-defined algorithm, carries out auto modification to described predetermined coal-air ratio prediction ammonia spraying amount function.
Based on technique scheme, the denitration spray ammonia automatic control system that the embodiment of the present invention provides, be applied to the system of coal-burning boiler SCR, the method can solve in prior art feedover theoretical ammonia spraying amount ammonia spraying amount and the unmatched problem of actual needs ammonia spraying amount, also by prediction algorithm correction feedforward ammonia spraying amount, make up the problem that measurement instrument measurement result exists large delay.Finally, by the solution of two problems, reach the object steadily controlling nitrogen oxides in effluent content, the probability reducing enterprise's oxides of nitrogen discharge beyond standards and the environmental protection risk that may bring, and reduce negative effect and economic loss that excessively spray ammonia brings.And the method can carry out auto modification to each function, improve accuracy and the adaptability of each function, finally reach control effects more accurately.
In instructions, each embodiment adopts the mode of going forward one by one to describe, and what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar portion mutually see.For device disclosed in embodiment, because it corresponds to the method disclosed in Example, so description is fairly simple, relevant part illustrates see method part.
Professional can also recognize further, in conjunction with unit and the algorithm steps of each example of embodiment disclosed herein description, can realize with electronic hardware, computer software or the combination of the two, in order to the interchangeability of hardware and software is clearly described, generally describe composition and the step of each example in the above description according to function.These functions perform with hardware or software mode actually, depend on application-specific and the design constraint of technical scheme.Professional and technical personnel can use distinct methods to realize described function to each specifically should being used for, but this realization should not thought and exceeds scope of the present invention.
The software module that the method described in conjunction with embodiment disclosed herein or the step of algorithm can directly use hardware, processor to perform, or the combination of the two is implemented.Software module can be placed in the storage medium of other form any known in random access memory (RAM), internal memory, ROM (read-only memory) (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technical field.
Above denitration spray ammonia autocontrol method provided by the present invention and system are described in detail.Apply specific case herein to set forth principle of the present invention and embodiment, the explanation of above embodiment just understands method of the present invention and core concept thereof for helping.It should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention, can also carry out some improvement and modification to the present invention, these improve and modify and also fall in the protection domain of the claims in the present invention.
Claims (10)
1. a denitration spray ammonia autocontrol method, is characterized in that, be applied to the system of coal-burning boiler SCR, comprise:
Obtain the inlet nitrogen oxides content of boiler total blast volume and described system, and described boiler total blast volume is multiplied with described inlet nitrogen oxides content, obtain amount of nitrogen oxides total in flue gas;
According to described amount of nitrogen oxides, utilize predetermined basic ammonia spraying amount feedforward function, obtain basic ammonia spraying amount;
According to the outlet amount of nitrogen oxides setting value of described system, obtain the correction factor of predetermined basic ammonia spraying amount, and described correction factor is multiplied with described basic ammonia spraying amount, obtain target ammonia spraying amount as denitration ammonia spraying amount.
2. denitration spray ammonia autocontrol method as claimed in claim 1, is characterized in that, also comprise:
Obtain the total coal amount of boiler, and described boiler total blast volume and the total coal amount of described boiler are divided by, obtain the coal-air ratio of boiler combustion;
According to described coal-air ratio, utilize predetermined coal-air ratio to predict ammonia spraying amount function, obtain predicted value;
According to described total blast volume, utilize predetermined wind amount correction factor, obtain the first ammonia spraying amount modified value;
Described predicted value is multiplied with described first ammonia spraying amount modified value, obtains revising feedforward ammonia spraying amount;
Obtain denitration ammonia spraying amount to comprise:
Utilize described target ammonia spraying amount and described correction feedforward ammonia spraying amount, obtain denitration ammonia spraying amount.
3. denitration spray ammonia autocontrol method as claimed in claim 1 or 2, is characterized in that, also comprise:
Obtain the outlet amount of nitrogen oxides of described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value;
Obtain denitration ammonia spraying amount to comprise:
Utilize described target ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount; Or
Utilize described target ammonia spraying amount, described correction feedforward ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount.
4. denitration spray ammonia autocontrol method as claimed in claim 1, is characterized in that, also comprise:
By pre-defined algorithm, auto modification is carried out to described predetermined basic ammonia spraying amount feedforward function.
5. denitration spray ammonia autocontrol method as claimed in claim 2, is characterized in that, also comprise:
By pre-defined algorithm, auto modification is carried out to described predetermined coal-air ratio prediction ammonia spraying amount function.
6. the denitration spray ammonia autocontrol method as described in claim 4 or 5, it is characterized in that, described pre-defined algorithm comprises: neural network algorithm and self-learning algorithm.
7. a denitration spray ammonia automatic control system, is characterized in that, be applied to the system of coal-burning boiler SCR, comprise:
Acquisition module, for obtaining the inlet nitrogen oxides content of boiler total blast volume and described system, and being multiplied described boiler total blast volume with described inlet nitrogen oxides content, obtaining amount of nitrogen oxides total in flue gas;
First computing module, for according to described amount of nitrogen oxides, utilizes predetermined basic ammonia spraying amount feedforward function, obtains basic ammonia spraying amount;
Second computing module, for the outlet amount of nitrogen oxides setting value according to described system, obtains the correction factor of predetermined basic ammonia spraying amount, and is multiplied with described basic ammonia spraying amount by described correction factor, obtain target ammonia spraying amount as denitration ammonia spraying amount.
8. denitration spray ammonia automatic control system as claimed in claim 7, is characterized in that, also comprise:
Coal-air ratio module, for obtaining the total coal amount of boiler, and being divided by described boiler total blast volume and the total coal amount of described boiler, obtaining the coal-air ratio of boiler combustion;
Prediction module, for according to described coal-air ratio, utilizes predetermined coal-air ratio to predict ammonia spraying amount function, obtains predicted value;
First correcting module, for according to described total blast volume, utilizes predetermined wind amount correction factor, obtains the first ammonia spraying amount modified value;
3rd computing module, for described predicted value being multiplied with described first ammonia spraying amount modified value, obtains revising feedforward ammonia spraying amount;
Second computing module also for utilizing described target ammonia spraying amount and described correction feedforward ammonia spraying amount, obtains denitration ammonia spraying amount.
9. denitration spray ammonia automatic control system as claimed in claim 8, is characterized in that, also comprise:
Second correcting module, for obtaining the outlet amount of nitrogen oxides of described system and corresponding outlet amount of nitrogen oxides setting value, and according to described outlet amount of nitrogen oxides and described outlet amount of nitrogen oxides setting value by the calculating of PID controller, obtain the second ammonia spraying amount modified value;
Second computing module also for utilizing described target ammonia spraying amount and described second ammonia spraying amount modified value, obtains denitration ammonia spraying amount; Or utilizing described target ammonia spraying amount, described correction feedforward ammonia spraying amount and described second ammonia spraying amount modified value, obtain denitration ammonia spraying amount.
10. denitration spray ammonia automatic control system as claimed in claim 9, is characterized in that, also comprise:
First correcting module, for by pre-defined algorithm, carries out auto modification to described predetermined basic ammonia spraying amount feedforward function;
Second correcting module, for by pre-defined algorithm, carries out auto modification to described predetermined coal-air ratio prediction ammonia spraying amount function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622480.XA CN105137760B (en) | 2015-09-25 | 2015-09-25 | A kind of denitration spray ammonia autocontrol method and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510622480.XA CN105137760B (en) | 2015-09-25 | 2015-09-25 | A kind of denitration spray ammonia autocontrol method and system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105137760A true CN105137760A (en) | 2015-12-09 |
| CN105137760B CN105137760B (en) | 2017-11-07 |
Family
ID=54723145
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510622480.XA Active CN105137760B (en) | 2015-09-25 | 2015-09-25 | A kind of denitration spray ammonia autocontrol method and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105137760B (en) |
Cited By (26)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105487377A (en) * | 2016-01-05 | 2016-04-13 | 江苏紫光吉地达环境科技有限公司 | Fuzzy controller of denitrated urea pyrolysis process |
| CN105561785A (en) * | 2015-12-16 | 2016-05-11 | 中国船舶重工集团公司第七一一研究所 | Urea solution jet control method of denitrification system based on dual MAPs |
| CN105700570A (en) * | 2016-04-15 | 2016-06-22 | 中国大唐集团科学技术研究院有限公司西北分公司 | SCR denitration control method for heat-engine plant |
| CN106178908A (en) * | 2016-08-22 | 2016-12-07 | 四川峨胜水泥集团股份有限公司 | The autocontrol method of SNCR denitration ammonia discharge rate |
| CN106647610A (en) * | 2017-02-04 | 2017-05-10 | 华北电力大学（保定） | Intelligent SCR (Selective Catalytic Reduction) denitration control system and control method thereof |
| CN106731590A (en) * | 2017-03-31 | 2017-05-31 | 华北电力大学（保定） | Suppression is opened, stops control method of the coal pulverizer on thermal power plant's discharged nitrous oxides influence |
| CN107694300A (en) * | 2016-08-08 | 2018-02-16 | 中冶长天国际工程有限责任公司 | The ammonia spraying amount control method and device of active carbon desulfurization denitrating system |
| CN107803114A (en) * | 2017-12-04 | 2018-03-16 | 烟台龙源电力技术股份有限公司 | A kind of denitration control system and its control method and control device |
| CN108325357A (en) * | 2018-03-02 | 2018-07-27 | 国电环境保护研究院有限公司 | A kind of the supply adjusting method and SCR system of reducing agent |
| CN108970357A (en) * | 2018-07-24 | 2018-12-11 | 中冶东方工程技术有限公司 | A kind of desulphurization denitration spray ammonia control method and control system |
| CN109062053A (en) * | 2018-08-31 | 2018-12-21 | 江苏国信靖江发电有限公司 | A kind of denitration spray ammonia control method based on multivariate calibration |
| CN109236427A (en) * | 2018-09-14 | 2019-01-18 | 国家能源投资集团有限责任公司 | The spray ammonia control method and device of SCR system |
| CN109395549A (en) * | 2018-11-26 | 2019-03-01 | 广东电网有限责任公司 | A kind of spray ammonia control method, device and computer readable storage medium |
| CN109433003A (en) * | 2018-11-28 | 2019-03-08 | 国家能源投资集团有限责任公司 | The control method and device of denitration control system ammonia spraying amount |
| CN109453664A (en) * | 2018-12-25 | 2019-03-12 | 国电科学技术研究院有限公司 | One kind is based on big data analysis coal fired power plant spray ammonia control method and denitrating system |
| CN110368808A (en) * | 2019-07-18 | 2019-10-25 | 华北电力科学研究院有限责任公司 | A kind of the ammonia spraying amount control method and system of SCR flue gas denitrification system |
| CN110501901A (en) * | 2019-07-08 | 2019-11-26 | 华能南京金陵发电有限公司 | The SCR spray ammonia required based on the accurate denitration of full load adjusts the method optimized |
| WO2020062865A1 (en) * | 2018-09-30 | 2020-04-02 | 广西玉柴机器股份有限公司 | CONTROL METHOD AND SYSTEM FOR SCR DOWNSTREAM NOₓ CLOSED-LOOP PROCESS |
| CN111228979A (en) * | 2020-03-05 | 2020-06-05 | 瀚蓝工程技术有限公司 | Advanced automatic control method and control device for PSR (polymer dispersed particulate reactor) polymer denitration dosage |
| CN111505940A (en) * | 2020-04-24 | 2020-08-07 | 山东交通学院 | Has future NOXFlue gas denitration control method with discharge amount prediction function |
| CN111624876A (en) * | 2020-04-23 | 2020-09-04 | 大唐环境产业集团股份有限公司 | Intelligent ammonia injection optimization control system |
| CN111841301A (en) * | 2020-07-23 | 2020-10-30 | 赵莉莉 | Garbage deodorization method and system |
| CN112619394A (en) * | 2020-11-24 | 2021-04-09 | 呼和浩特科林热电有限责任公司 | Denitration ammonia injection self-adaptive control method and device and denitration system |
| CN112915741A (en) * | 2021-01-13 | 2021-06-08 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Denitration optimization method |
| CN113856457A (en) * | 2021-09-27 | 2021-12-31 | 京能（锡林郭勒）发电有限公司 | NOx emission control system for low-calorific-value lignite |
| CN114307627A (en) * | 2021-11-22 | 2022-04-12 | 华能山东发电有限公司白杨河发电厂 | Denitration adjusting method based on theoretical ammonia consumption |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380143A2 (en) * | 1986-10-07 | 1990-08-01 | Nippon Kokan Kabushiki Kaisha | An apparatus for denitration of exhaust gas |
| CN101165331A (en) * | 2006-10-19 | 2008-04-23 | 本田技研工业株式会社 | Control apparatus and control method |
-
2015
- 2015-09-25 CN CN201510622480.XA patent/CN105137760B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0380143A2 (en) * | 1986-10-07 | 1990-08-01 | Nippon Kokan Kabushiki Kaisha | An apparatus for denitration of exhaust gas |
| CN101165331A (en) * | 2006-10-19 | 2008-04-23 | 本田技研工业株式会社 | Control apparatus and control method |
Non-Patent Citations (4)
| Title |
|---|
| 武宝会 等: "火电厂SCR烟气脱硝控制方式及其优化", 《热力发电》 * |
| 毛奕升: "烟气脱硝喷氨自动控制回路的优化", 《华电技术》 * |
| 王杭州: "燃烧工况对NO_X排放影响试验分析", 《全国火电大机组（300MW 级）竞赛第37届年会论文集》 * |
| 赵乾: "SCR烟气脱硝系统模拟优化及喷氨量最优控制", 《中国优秀硕士学位论文全文数据库工程科技Ⅰ辑》 * |
Cited By (37)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105561785A (en) * | 2015-12-16 | 2016-05-11 | 中国船舶重工集团公司第七一一研究所 | Urea solution jet control method of denitrification system based on dual MAPs |
| CN105487377B (en) * | 2016-01-05 | 2019-05-14 | 国家电投集团远达环保装备制造有限公司 | A kind of fuzzy controller of denitration urea pyrolysis technique |
| CN105487377A (en) * | 2016-01-05 | 2016-04-13 | 江苏紫光吉地达环境科技有限公司 | Fuzzy controller of denitrated urea pyrolysis process |
| CN105700570A (en) * | 2016-04-15 | 2016-06-22 | 中国大唐集团科学技术研究院有限公司西北分公司 | SCR denitration control method for heat-engine plant |
| CN107694300A (en) * | 2016-08-08 | 2018-02-16 | 中冶长天国际工程有限责任公司 | The ammonia spraying amount control method and device of active carbon desulfurization denitrating system |
| CN107694300B (en) * | 2016-08-08 | 2020-01-17 | 中冶长天国际工程有限责任公司 | Ammonia spraying amount control method and device of activated carbon desulfurization and denitrification system |
| CN106178908A (en) * | 2016-08-22 | 2016-12-07 | 四川峨胜水泥集团股份有限公司 | The autocontrol method of SNCR denitration ammonia discharge rate |
| CN106647610A (en) * | 2017-02-04 | 2017-05-10 | 华北电力大学（保定） | Intelligent SCR (Selective Catalytic Reduction) denitration control system and control method thereof |
| CN106731590A (en) * | 2017-03-31 | 2017-05-31 | 华北电力大学（保定） | Suppression is opened, stops control method of the coal pulverizer on thermal power plant's discharged nitrous oxides influence |
| CN107803114A (en) * | 2017-12-04 | 2018-03-16 | 烟台龙源电力技术股份有限公司 | A kind of denitration control system and its control method and control device |
| CN107803114B (en) * | 2017-12-04 | 2020-06-16 | 烟台龙源电力技术股份有限公司 | Denitration control system and control method and control device thereof |
| CN108325357A (en) * | 2018-03-02 | 2018-07-27 | 国电环境保护研究院有限公司 | A kind of the supply adjusting method and SCR system of reducing agent |
| CN108325357B (en) * | 2018-03-02 | 2023-10-24 | 国电环境保护研究院有限公司 | SCR system of power plant boiler and reducing agent supply adjusting method thereof |
| CN108970357A (en) * | 2018-07-24 | 2018-12-11 | 中冶东方工程技术有限公司 | A kind of desulphurization denitration spray ammonia control method and control system |
| CN108970357B (en) * | 2018-07-24 | 2021-01-26 | 中冶东方工程技术有限公司 | Desulfurization and denitrification ammonia injection control method and control system |
| CN109062053A (en) * | 2018-08-31 | 2018-12-21 | 江苏国信靖江发电有限公司 | A kind of denitration spray ammonia control method based on multivariate calibration |
| CN109236427B (en) * | 2018-09-14 | 2020-11-03 | 国家能源投资集团有限责任公司 | Ammonia spraying control method and device for SCR system, storage medium and processor |
| CN109236427A (en) * | 2018-09-14 | 2019-01-18 | 国家能源投资集团有限责任公司 | The spray ammonia control method and device of SCR system |
| WO2020062865A1 (en) * | 2018-09-30 | 2020-04-02 | 广西玉柴机器股份有限公司 | CONTROL METHOD AND SYSTEM FOR SCR DOWNSTREAM NOₓ CLOSED-LOOP PROCESS |
| CN109395549B (en) * | 2018-11-26 | 2020-04-21 | 广东电科院能源技术有限责任公司 | Ammonia injection control method and device and computer readable storage medium |
| CN109395549A (en) * | 2018-11-26 | 2019-03-01 | 广东电网有限责任公司 | A kind of spray ammonia control method, device and computer readable storage medium |
| CN109433003B (en) * | 2018-11-28 | 2021-11-19 | 国家能源投资集团有限责任公司 | Method and device for controlling ammonia injection amount of denitration control system |
| CN109433003A (en) * | 2018-11-28 | 2019-03-08 | 国家能源投资集团有限责任公司 | The control method and device of denitration control system ammonia spraying amount |
| CN109453664A (en) * | 2018-12-25 | 2019-03-12 | 国电科学技术研究院有限公司 | One kind is based on big data analysis coal fired power plant spray ammonia control method and denitrating system |
| CN110501901A (en) * | 2019-07-08 | 2019-11-26 | 华能南京金陵发电有限公司 | The SCR spray ammonia required based on the accurate denitration of full load adjusts the method optimized |
| CN110501901B (en) * | 2019-07-08 | 2022-05-10 | 华能南京金陵发电有限公司 | SCR ammonia injection regulation optimization method based on full-load accurate denitration requirement |
| CN110368808A (en) * | 2019-07-18 | 2019-10-25 | 华北电力科学研究院有限责任公司 | A kind of the ammonia spraying amount control method and system of SCR flue gas denitrification system |
| CN111228979A (en) * | 2020-03-05 | 2020-06-05 | 瀚蓝工程技术有限公司 | Advanced automatic control method and control device for PSR (polymer dispersed particulate reactor) polymer denitration dosage |
| CN111624876A (en) * | 2020-04-23 | 2020-09-04 | 大唐环境产业集团股份有限公司 | Intelligent ammonia injection optimization control system |
| CN111624876B (en) * | 2020-04-23 | 2021-06-15 | 大唐环境产业集团股份有限公司 | Intelligent ammonia injection optimization control system |
| CN111505940A (en) * | 2020-04-24 | 2020-08-07 | 山东交通学院 | Has future NOXFlue gas denitration control method with discharge amount prediction function |
| CN111841301A (en) * | 2020-07-23 | 2020-10-30 | 赵莉莉 | Garbage deodorization method and system |
| CN112619394A (en) * | 2020-11-24 | 2021-04-09 | 呼和浩特科林热电有限责任公司 | Denitration ammonia injection self-adaptive control method and device and denitration system |
| CN112915741A (en) * | 2021-01-13 | 2021-06-08 | 中国大唐集团科学技术研究院有限公司火力发电技术研究院 | Denitration optimization method |
| CN113856457A (en) * | 2021-09-27 | 2021-12-31 | 京能（锡林郭勒）发电有限公司 | NOx emission control system for low-calorific-value lignite |
| CN113856457B (en) * | 2021-09-27 | 2024-04-02 | 京能（锡林郭勒）发电有限公司 | NOx emission control system for low-heat-value lignite |
| CN114307627A (en) * | 2021-11-22 | 2022-04-12 | 华能山东发电有限公司白杨河发电厂 | Denitration adjusting method based on theoretical ammonia consumption |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105137760B (en) | 2017-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105137760A (en) | Denitration spraying ammonia automation control method and system | |
| CN104826492B (en) | Improvement method for selective catalytic reduction flue gas denitrification and ammonia injection control system | |
| CN105797576B (en) | Denitration ammonia injection control method for coal-fired unit | |
| CN104826493B (en) | A kind of control method of selective catalytic reduction flue gas denitrification system | |
| US9447963B2 (en) | Dynamic tuning of dynamic matrix control of steam temperature | |
| CN111897373B (en) | Model prediction-based ammonia injection flow adjusting method for SCR denitration device | |
| CN109343349A (en) | A kind of SCR denitrating flue gas Optimal Control System and method based on ammonia spraying amount compensator | |
| CN105700570B (en) | SCR denitration control method for thermal power plant | |
| CN108730968B (en) | Desulfurization control method and device | |
| US9217565B2 (en) | Dynamic matrix control of steam temperature with prevention of saturated steam entry into superheater | |
| CN110501901B (en) | SCR ammonia injection regulation optimization method based on full-load accurate denitration requirement | |
| CN110479061B (en) | SNCR control system and method based on furnace temperature field information | |
| US20140056788A1 (en) | Method for the model-based feedback control of an scr system having at least one scr catalytic converter | |
| CN112180851B (en) | Method and device for controlling production line, computer equipment and storage medium | |
| US20140030810A1 (en) | Method for the dynamic detection of leakages for scr catalytic converters | |
| CN105102781A (en) | Method of controlling ammonia levels in catalytic units | |
| CN104793652A (en) | Load dispatch curve based ammonia injection quantity adjustment method and system | |
| CN114307627B (en) | Denitration adjusting method based on theoretical ammonia consumption | |
| CN108325357B (en) | SCR system of power plant boiler and reducing agent supply adjusting method thereof | |
| CN208161367U (en) | A kind of SCR system | |
| CN105511436B (en) | The control method for coordinating of two reactor ammonia spraying amounts of flue gas denitrification system and system | |
| JPH0263524A (en) | Method for controlling amount of nh3 to be injected into exhaust gas denitrification device | |
| CN102761055A (en) | Light power optimization control system for metallic-seal radio-frequency carbon dioxide laser | |
| CN117077362A (en) | Logic calculation method and system based on boiler load SCR ammonia gas | |
| CN115155310B (en) | SCR denitration system ammonia spraying accurate optimization method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB03 | Change of inventor or designer information | ||
| CB03 | Change of inventor or designer information |
Inventor after: Zhang Shengqiang Inventor after: Li Zhenwei Inventor after: Wang Yulin Inventor after: Wang Tao Inventor after: Zhang Shenggang Inventor after: Li Gang Inventor after: Ge Jun Inventor before: Li Zhenwei Inventor before: Wang Yulin Inventor before: Zhang Shengqiang Inventor before: Wang Tao Inventor before: Zhang Shenggang Inventor before: Li Gang Inventor before: Ge Jun |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |